<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
	</head>
	<body>
		<script>
			var zhangsan=80;
			var lisi;
			lisi=zhangsan;
			alert("李四的身高是："+lisi);
		</script>
	</body>
</html>
